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The radius of two cylinders are in the ratio of 2 : 3 and their height are in the ratio 5 : 3 . The ratio of their volumes is ?
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- 27 : 20
- 20 : 27
- 4 : 9
- 9 : 4
Correct Option: B
Let their radii be 2r and 3r and height 5h and 3h respectively.
∴ Ratio of their volumes = [π(2r)2 x 5h] / [π(3r)2 x 3h]
= 20/27 = 20 : 27
